﻿using System;
using System.IO;
using System.Runtime.InteropServices;

namespace Apewer.Internals.Interop
{

    [System.Security.SecuritySafeCritical]
    class Kernel32
    {

        [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
        public static extern int CloseHandle(int hObject);

        [DllImport("kernel32.dll", SetLastError = true)]
        // [return: MarshalAs(UnmanagedType.Bool)]
        public static extern bool CloseHandle(IntPtr hObject);

        [DllImport("kernel32.dll")]
        public static extern IntPtr CreateFile(string lpFileName, uint dwDesiredAccess, FileShare dwShareMode, IntPtr securityAttrs, FileMode dwCreationDisposition, uint dwFlagsAndAttributes, IntPtr hTemplateFile);

        [DllImport("kernel32.dll")]
        public static extern IntPtr CreateFileMapping(IntPtr hFile, IntPtr lpFileMappingAttributes, uint flProtect, uint dwMaximumSizeHigh, uint dwMaximumSizeLow, string lpName);

        [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
        public static extern IntPtr CreateMutex(IntPtr lpMutexAttributes, int bInitialOwner, string lpName);

        [DllImport("kernel32.dll")]
        public static extern bool CreateProcess(string lpApplicationName, string lpCommandLine, IntPtr lpProcessAttributes, IntPtr lpThreadAttributes, bool bInheritHandles, uint dwCreationFlags, IntPtr lpEnvironment, string lpCurrentDirectory, ref StartupInfo lpStartupInfo, ref ProcessInformation lpProcessInformation);

        [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
        public static extern int GetExitCodeProcess(int hProcess, out int lpExitCode);

        [DllImport("kernel32.dll", SetLastError = true)]
        public static extern uint GetFileSize(IntPtr hFile, out uint highSize);

        [DllImport("kernel32.dll")]
        private static extern uint GetLastError();

        [DllImport("kernel32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
        public static extern IntPtr GetModuleHandle(string lpModuleName);

        [DllImport("kernel32.dll", ExactSpelling = true)]
        public static extern IntPtr GetCurrentProcess();

        [DllImport("kernel32.dll", CharSet = CharSet.Auto, ExactSpelling = true)]
        public static extern int GetCurrentThreadId();

        [DllImport("kernel32")]
        public static extern int GetShortPathName(string lpszLongPath, string lpszShortPath, int cchBuffer);

        [DllImport("kernel32.dll", SetLastError = true)]
        public static extern void GetSystemInfo(ref SystemInfo lpSystemInfo);

        [DllImport("kernel32.dll")]
        public static extern IntPtr MapViewOfFile(IntPtr hFileMappingObject, uint dwDesiredAccess, uint dwFileOffsetHigh, uint dwFileOffsetLow, uint dwNumberOfBytesToMap);

        [DllImport("kernel32", BestFitMapping = false, CharSet = CharSet.Auto, SetLastError = true, ThrowOnUnmappableChar = true)]
        public static extern int MoveFile([MarshalAs(UnmanagedType.LPTStr)][In] string lpExistingFileName, [MarshalAs(UnmanagedType.LPTStr)][In] string lpNewFileName);

        [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
        public static extern IntPtr OpenMutex(uint dwDesiredAccess, int bInheritHandle, string lpName);

        [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
        public static extern int OpenProcess(int dwDesiredAccess, int bInheritHandle, int dwProcessId);

        [DllImport("kernel32.dll", EntryPoint = "OpenProcess")]
        public static extern IntPtr OpenProcess(int dwDesiredAccess, bool bInheritHandle, int dwProcessId);

        // BOOL ReadProcessMemory([in] HANDLE hProcess, [in] LPCVOID lpBaseAddress, [out] LPVOID lpBuffer, [in] SIZE_T nSize, [out] SIZE_T *lpNumberOfBytesRead);
        [DllImport("kernel32.dll ")]
        public static extern bool ReadProcessMemory(IntPtr hProcess, int lpBaseAddress, byte[] lpBuffer, int nSize, out int lpNumberOfBytesRead);

        /// <summary>Copies the contents of a source memory block to a destination memory block, and supports overlapping source and destination memory blocks.</summary>
        /// <param name="Destination">A pointer to the destination memory block to copy the bytes to.</param>
        /// <param name="Source">A pointer to the source memory block to copy the bytes from.</param>
        /// <param name="Length">The number of bytes to copy from the source to the destination.</param>
        [DllImport("kernel32.dll", EntryPoint = "RtlMoveMemory")]
        public static extern void RtlMoveMemory(ref double Destination, int Source, int Length);

        [DllImport("kernel32")]
        public static extern int Sleep(int millisecond);

        /// <summary>撤消文件映像。</summary>
        [DllImport("kernel32.dll")]
        public static extern bool UnmapViewOfFile(IntPtr lpBaseAddress);

        // BOOL WriteProcessMemory([in] HANDLE hProcess, [in] LPVOID lpBaseAddress, [in] LPCVOID lpBuffer, [in] SIZE_T nSize, [out] SIZE_T *lpNumberOfBytesWritten);
        [DllImport("kernel32.dll")]
        public static extern bool WriteProcessMemory(IntPtr hProcess, IntPtr lpBaseAddress, byte[] lpBuffer, int nSize, out int lpNumberOfBytesWritten);

    }

}
